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Moving armature receiver assemblies with vibration suppression

a technology of moving armature and receiver, which is applied in the direction of instruments, frequency/directions obtaining arrangements, sound producing devices, etc., can solve the problems of relatively small compliance or large stiffness of suspensions, low efficiency of mirror-symmetrical dual-receiver design, and oscillation of feedback, etc., to achieve the effect of suppressing vibration of the receiver housing

Active Publication Date: 2016-10-18
SONION NEDERLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a moving armature receiver assembly for a hearing instrument that reduces mechanical vibration and noise. The invention achieves this by rotating U-shaped armatures in opposite directions, which results in the suppression of force components acting on the deflectable legs of the armatures. The use of a common or shared magnet gap further reduces the size of the assembly. The invention also includes the use of identically sized portions of the deflectable legs in the common magnet gap to achieve effective vibration suppression. The invention provides a compact and low-height receiver assembly with low manufacturing costs.

Problems solved by technology

These vibration components are undesirable in numerous applications such as hearing instruments or other personal communication devices where these vibrations may cause feedback oscillation due to the coupling of mechanical vibration from the housing of the moving armature receiver to a vibration sensitive microphone of the personal communication device.
However, these resilient suspensions exhibit relatively small compliance or large stiffness along a longitudinal housing plane of the receiver while exhibiting a much larger compliance in the housing planes transversal to the longitudinal housing plane.
Unfortunately, this type of mirror-symmetrical dual-receiver design is not very efficient in cancelling or attenuating mechanical vibrations along the central longitudinal plane of the receiver housing.

Method used

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  • Moving armature receiver assemblies with vibration suppression
  • Moving armature receiver assemblies with vibration suppression
  • Moving armature receiver assemblies with vibration suppression

Examples

Experimental program
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Effect test

first embodiment

[0050]FIG. 2 is a simplified schematic cross-sectional view of a moving armature receiver assembly 200 or dual-receiver 200 based on two U-shaped armatures 202, 222 in accordance with the invention. The dual-receiver 200 comprises two U-shaped armatures 202, 222 enclosed within a shared housing structure 201 separated by a rigid dividing wall 215. These U-shaped armatures 202, 222 may be conventionally fabricated by machining and bending of a single flat piece of ferromagnetic material. In the alternative, the housing structure may be formed by a pair of rigidly fastened separate housings as discussed above in connection with FIG. 1. The cross-sectional view is taken centrally and vertically, i.e. along a z-axis plane of the housing structure 201. While the upper and lower portions of the dual-receiver 100 are substantially identical in terms of dimensions and materials, the lower portion is rotated 180 degree about the z-axis plane compared to the mirror-symmetrical arrangement dep...

second embodiment

[0057]FIG. 2B is a simplified schematic cross-sectional view of a moving armature receiver assembly 200b or dual-receiver based on two U-shaped armatures 202, 222 in accordance with a 7th embodiment of the invention. Corresponding features of the second embodiment and the present embodiment have been provided with the same reference numerals to ease comparison. The dual-receiver 200b comprises two U-shaped armatures 202, 222 enclosed within a shared housing structure 201. The upper and lower half portion of the dual-receiver 200b is arranged such that the lower U-shaped armature and its associated motor systems, comprising a pair of permanent magnets 226 magnetically coupled to a magnet housing 224, has been turned upside down, i.e. rotated 180 degrees about the lower longitudinal armature plane 239 compared to the embodiment depicted on FIG. 2A. In this manner, the deflectable leg 230 of the lower U-shaped armature 222 faces a lower compliant diaphragm 229. The deflectable leg 210 ...

third embodiment

[0069]FIG. 5 is a simplified schematic cross-sectional view of a dual-receiver based on two U-shaped armatures 502, 522 sharing a common magnet gap 512 in accordance with the invention. The depicted cross-sectional view is taken centrally and vertically, i.e. along a z-axis plane extending as indicated by dotted arrow “z”, of a shared receiver housing (not shown) through the U-shaped armatures 502, 522. The dual-receiver 500 comprises an upper U-shaped armature 502 and a lower U-shaped armature 522 enclosed within the shared receiver housing (not shown). The upper and lower U-shaped armatures 502, 522 may be conventionally fabricated by machining and bending of a single flat piece of ferromagnetic material. The common magnet gap 512 is formed between a pair of permanent magnets 506, 526 which creates a magnetic field within the common magnet gap 512. The upper U-shaped armature 502 comprises a fixed leg 505 attached, and magnetically coupled, to a magnet housing 504 which in turn ma...

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Abstract

Moving armature receiver assemblies wherein a first U-shaped armature and a second U-shaped armature are configured for suppression of vibration of a housing structure along a longitudinal housing plane. The first and second U-shaped armatures may be shifted away from each other along a longitudinal housing plane to render the first and second U-shaped armatures partially overlapping in the orthogonal plane with a predetermined overlap distance.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a continuation-in-part of prior application Ser. No. 13 / 422,746, filed Mar. 16, 2012, now allowed, entitled “Moving Armature Receiver Assemblies with Vibration Suppression”, which claims the benefit of U.S. Provisional Ser. No. 61 / 454,759, filed Mar. 21, 2011, both of which are incorporated herein by reference in their entireties.FIELD OF THE INVENTION[0002]The present invention relates to moving armature receiver assemblies wherein a first U-shaped armature and a second U-shaped armature are configured for suppression of vibration of a housing structure along a longitudinal housing plane. The first and second U-shaped armatures may be shifted away from each other along a longitudinal housing plane to render the first and second U-shaped armatures partially overlapping in the orthogonal plane with a predetermined overlap distance.BACKGROUND OF THE INVENTION[0003]Moving armature receivers are widely used to convert elect...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04R11/02H04R1/28H04R1/40G10K11/16H04R25/00H04R1/22
CPCH04R11/02G10K11/16H04R1/2873H04R1/403H04R1/227H04R25/00
Inventor VAN HALTEREN, AART ZEGERTIEFENAU, ANDREASLAFORT, ADRIANUS MARIA
Owner SONION NEDERLAND
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